- [last lines]
- Optimus Prime: There are mysteries to the universe we were never meant to solve. But who we are and why we are here, are not among them. Those answers we carry inside. I am Optimus Prime, and this message is to my Creators: leave planet Earth alone, 'cause I'm coming for you!
- Cade Yeager: When you said you were done fighting for humans, you didn't mean that, did you?
- Optimus Prime: How many more of my kind must be sacrificed, to atone for YOUR mistakes?
- Cade Yeager: What do you think being human means? That's what we do. We make mistakes. Sometimes, out of those mistakes come the most amazing things... When I fixed you, it was for a reward. That was it. That was why. The money. And it was me making a mistake. Without it, you wouldn't be here. So even if you got no faith in us, I'm asking you to do what I do. I'm asking you to look at all the junk and see the treasure. You gotta have faith, Prime, in who we can be.
- [Cade tends to Optimus Prime]
- Optimus Prime: Cade, why are you willing to help me?
- Cade Yeager: Cause you trust me to.
- [from trailer]
- [Cade jumpstarts a truck with a cable]
- Optimus Prime: Calling all Autobots...
- Cade Yeager: I think we just found a Transformer!
- [Bumblebee knocks down Stinger]
- Joshua Joyce: [looks at Shane] What did you touch?
- Bumblebee: [through radio] "I told you homeboy! You can't touch this!"
- Optimus Prime: You have no soul!
- [runs Galvatron through with his sword]
- Galvatron: That is why I have no fear!
- Optimus Prime: Within that man-made protype I fought, I felt the presence of Megatron.
- Cade Yeager: The Decepticon who started the Chicago war?
- Brains: How do you think KSI built those bots in the first place, hmm? They had a whole mess of dead Decepticon heads, and they were downloading their minds! And Iw as in charge of autopsy duty, no union, no benefits, no nothing! They hooked me up to Megatron, and that mind wasn't as dead as they thought! He fed them the science and the specs, all so he could build them a brand new body! Then he infected it with his evil nasty chromosomes! Total inside custom job! KSI might have named the body a snazzy name like Galvatron, but that's just Megatron reincarnated!
- Tessa Yeager: You knew this, and you didn't warn them?
- Brains: Little girl, you go into a pretty dark place when you're on death row. He's been playing KSI all this time, all so he could manipulate them into going after the Seed!
- Shane Dyson: The Seed?
- Tessa Yeager: Those nasty soldiers that were chasing us, I saw them take something that they called the Seed...
- Hound: Sixty million years ago, give or take an eon.
- Optimus Prime: Thousands of planets were cyberformed with Seeds. They turned your life into our elemental metal. Our creators destroyed your species to make us.
- Brains: And that's what Galvatron wants to happen again! He wants to detonate that Seed in the biggest city and kill millions! He's going to show the world "Baby, I'm back!"
- Optimus Prime: The blast wave will incinerate that city into molten metal. He'll have enough to build a massive army, and annihalate your species for ever.
- Brains: You dumb greedy bastards just brought extinction to yourselves! Not my problem, though! I'm free at last! The whole thing worked out good for me!
- [from trailer]
- Optimus Prime: Who sent you here?
- Lockdown: You think you were born? You were built! And they want you back.
- Optimus Prime: [to the Dinobots] Legendary warriors, the powers that created us now want us all extinguished. We must join forces, or else we'll all be their slaves. So today you stand with us... or you stand against me.
- [Grimlock roars at Optimus and attacks him]
- Crosshairs: We'll let Prime figure this one out...
- Drift: Very wise.
- Crosshairs: [climbs up a waterfall] There's no way I'm staying down with them, NO WAY!
- Optimus Prime: [punches Grimlock] Only together can we survive! Let me lead you!
- [Grimlock transforms into a T-rex and roars fire]
- Crosshairs: Oh, no...
- Drift: I was expecting a giant car!
- Optimus Prime: Come here!
- [Grimlock charges at Prime]
- Optimus Prime: We're giving you freedom!
- [sucker punches Grimlock to the ground, and draws his blade]
- Optimus Prime: Defend my family, or die!
- [Grimlock submits to Optimus]
- Harold Attinger: [holds Cade at gunpoint] You see, it takes patience to make a man. The patience to watch and wait, to protect all of us quietly, for God and country, without any recognition at all!
- Optimus Prime: [as he is fighting Lockdown] Cade!
- Harold Attinger: There are no good aliens or bad aliens, Yeager! It's just us and them! And you chose them...
- [Optimus Prime guns down Attinger]
- Cade Yeager: Anytime.
- Optimus Prime: A great threat is coming...
- Cade Yeager: What if you had some human help?
- Tessa Yeager: You're his partner now?
- Cade Yeager: Sweetie, we're targets now too! We have to find out why we'll never get our lives back again!
- [Optimus climbs on Grimlock]
- Optimus Prime: Autobots, we're gonna prove who we are and why we're here!
- Crosshairs: Ugh, you just want to die for the guy. That's leadership. Or brainwashing, or something.
- Drift: No... that's Optimus Prime.
- [the other Dinobots transform as Crosshairs rides Scorn and Drift rides Slug]
- Optimus Prime: Autobots, we charge together! Now, roll out!
- [from trailer]
- Optimus Prime: After all we have done, humans are hunting us. But I fear we are all targets now.
- James Savoy: You should never have hidden that truck!
- Cade Yeager: You shouldn't have come after my family!
- James Savoy: Tough luck, Yeager. We all have family!
- Cade Yeager: Yeah, but at least I'm going to live to see mine.
- [knocks down Savoy with a football]
- Lockdown: Welcome back to the Knights Terminus, Prime.
- Optimus Prime: You have disgraced it...
- Lockdown: Join your fellow rebels, fugitive scum! It's for the rarest of specimens, the worst of the worst. It's taken centuries, but I've collected all the Knights, but you. The Creators want to sweep their chessboard clean.
- Optimus Prime: I am slave to no one.
- Lockdown: All this species mixing with species, it upsets the cosmic balance. The Creators, they don't like it. They built you to do what you were told.
- Joshua Joyce: I can't believe I'm putting my life in your hands.
- Cade Yeager: You want the alien gun? Take it!
- Joshua Joyce: No, I don't want the alien gun.
- Joshua Joyce: [to Cade] I may have started the apocalypse, but you brought your family. And that's, you know, terrible parenting.
- Cade Yeager: I'm about one second away from knocking you out, taking the bomb and just leaving you here.
- Joshua Joyce: Do me the favour, please?
- Cade Yeager: We're going to save Prime!
- Crosshairs: Why should we? What's in it for me?
- Hound: [puts a gun to Crosshairs's head] What's in it for you is I don't kill ya. We're gettin' the boss back, and the girl!
- Cade Yeager: [to Shane] You know, when I was your age, I liked to get a little wild. I liked cars, girls. But then there was Tessa. And when she was born, all I ever wanted out of life was for her to be happy and healthy and safe. Somehow I thought I'd always be enough to protect her. But I won't be. I'll never be. So somebody better be. Thanks for being here today, Lucky Charms.
- Shane Dyson: Well, thanks for not shooting me when you had the chance.
- Cade Yeager: I'll have more.
- Shane Dyson: Yeah, I can see that.
- Optimus Prime, Cade Yeager: There remains a price on my head. I endanger you all if I stay. I shall take the Seed where it can never be found.
- Cade Yeager: Will we ever see you again?
- Optimus Prime: Cade Yeager, I do not know. But whenever you look to the stars, think of one of them as my soul. Defend this family, Autobots. As they have you. Defend all they can be.
- [from trailer]
- Harold Attinger: You're trying to defend your family, that's admirable. I'm trying to defend the nation from alien war.
- Harold Attinger: Here on Earth we have a saying: "The enemy of my enemy is my friend."
- Lockdown: I also have a saying: "I don't care."
- Joshua Joyce: What we do here is science. Because if we don't do it, somebody else will. Because you cannot stop technology.
- Optimus Prime: We are NOT your technology!
- [Optimus changes from a cab-over to a tanker]
- Shane Dyson: That was insane! It was awesome, but it was insane!
- Optimus Prime: [sees Leadfoot and Ratchet get killed by humans] I have sworn to never kill humans...
- Hound: Big mistake.
- Optimus Prime: ...but when I find out who's behind this, he's going to die.